| 喷雾干燥法制备球形钨粉及还原过程的研究 |
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| 引用本文： | 崔云涛,王金淑,刘 伟,臧 磊,李 硕,李 真,叶凌寒,周美玲.喷雾干燥法制备球形钨粉及还原过程的研究[J].稀有金属材料与工程,2011,40(3):507-510. |
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| 作者姓名： | 崔云涛 王金淑 刘 伟 臧 磊 李 硕 李 真 叶凌寒 周美玲 |
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| 作者单位： | 北京工业大学,新型功能材料教育部重点实验室,北京,100124 |
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| 基金项目： | 国家 “863” 项目(12009011200701); 国家自然科学基金(50801001); 博士研究生创新计划(bcx-2009-075) |
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| 摘 要： | 以偏钨酸铵(AMT)为原料,采用喷雾干燥法结合氢气还原方法成功制备出球形钨粉。随后利用SEM、TEM、激光粒度分析仪和XRD等分析方法对粉末微观形貌、颗粒平均粒度、粒度分布和还原过程中的相变情况进行研究。结果表明,前驱粉末为球形,煅烧后,颗粒形貌未发生明显变化,仍保持球形;TEM结果显示粉末是球形中空结构。同时探讨了溶液浓度、鼓风速度、给料速度对粉末粒度的影响。激光粒度分析结果表明,溶液浓度对粉末的平均粒度影响最大,溶液浓度越大,颗粒的平均粒度就越大。粒度分布越集中,而给料速度对颗粒的平均粒度影响不明显。XRD结果显示,氢气气氛下,550℃保温2h,α-W相出现;还原温度升高到750℃,保温2h,WO3被完全还原为α-W。
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| 关 键 词： | 喷雾干燥 球形钨粉 阴极材料 还原 |
| 收稿时间： | 2010/3/25 0:00:00 |
Study on Fabrication of Spherical Tungsten Powder by Spray-Dryingand Reduction Process |
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| Cui Yuntao,Wang Jinshu,Liu Wei,Zang Lei,Li Shuo,Li Zhen,Ye Linghan and Zhou Meiling.Study on Fabrication of Spherical Tungsten Powder by Spray-Dryingand Reduction Process[J].Rare Metal Materials and Engineering,2011,40(3):507-510. |
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| Authors: | Cui Yuntao Wang Jinshu Liu Wei Zang Lei Li Shuo Li Zhen Ye Linghan and Zhou Meiling |
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| Affiliation: | Key Laboratory of New Functional Materials, Ministry of Education, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | The spherical tungsten powder was fabricated by spray-drying method combined with hydrogen reduction using ammonium metatungstate(AMT) as raw materials.The powder morphology,mean particle size,particle size distribution and phase transformation process of reduction were characterized by SEM,TEM,XRD and laser diffraction particle size analyzer,respectively.Results show that the morphology of the powder prepared by spray drying is hollow sphere,and both of AMT and WO3 powder has similar good spherical structu... |
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| Keywords: | spray-drying spherical tungsten powder cathode materials reduction |
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